55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
// addrspace.h
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// Data structures to keep track of executing user programs
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// (address spaces).
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//
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// For now, we don't keep any information about address spaces.
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// The user level CPU state is saved and restored in the thread
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// executing the user program (see thread.h).
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//
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// Copyright (c) 1992-1993 The Regents of the University of California.
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// All rights reserved. See copyright.h for copyright notice and limitation
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// of liability and disclaimer of warranty provisions.
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#ifndef ADDRSPACE_H
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#define ADDRSPACE_H
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#include "copyright.h"
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#include "filesys.h"
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#include "translate.h"
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#include "noff.h"
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#include "list.h"
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#define UserStacksAreaSize 1024 // increase this as necessary!
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class AddrSpace:public dontcopythis
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{
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public:
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AddrSpace (OpenFile * executable); // Create an address space,
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// initializing it with the program
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// stored in the file "executable"
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~AddrSpace (); // De-allocate an address space
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void InitRegisters (); // Initialize user-level CPU registers,
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// before jumping to user code
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void SaveState (); // Save/restore address space-specific
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void RestoreState (); // info on a context switch
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unsigned Dump(FILE *output, unsigned addr_s, unsigned sections_x, unsigned virtual_x, unsigned virtual_width,
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unsigned physical_x, unsigned virtual_y, unsigned y,
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unsigned blocksize);
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// Dump program layout as SVG
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unsigned NumPages() { return numPages; }
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#ifdef CHANGED
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int AllocateUserStack();
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#endif
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private:
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NoffHeader noffH; // Program layout
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TranslationEntry * pageTable; // Page table
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unsigned int numPages; // Number of pages in the page table
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};
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extern List AddrspaceList;
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#endif // ADDRSPACE_H
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